../ dmsp_15_ephemeris_20190915.txt 22-Jun-2023 16:57 109638 dmsp_16_ephemeris_20190915.txt 22-Jun-2023 16:57 109681 dmsp_17_ephemeris_20190915.txt 22-Jun-2023 16:57 109637 dmsp_18_ephemeris_20190915.txt 22-Jun-2023 16:57 109652